Abstract
Objective
The aim of this study is to identify a rapid, sensitive, and non-destructive auxiliary approach for postmortem diagnosis of SCD, addressing the challenges faced in forensic practice.
Methods
ATR-FTIR spectroscopy was employed to collect spectral features of blood samples from different cases, combined with pathological changes. Mixed datasets were analyzed using ANN, KNN, RF, and SVM algorithms. Evaluation metrics such as accuracy, precision, recall, F1-score and confusion matrix were used to select the optimal algorithm and construct the postmortem diagnosis model for SCD.
Results
A total of 77 cases were collected, including 43 cases in the SCD group and 34 cases in the non-SCD group. A total of 693 spectrogram were obtained. Compared to other algorithms, the SVM algorithm demonstrated the highest accuracy, reaching 95.83% based on spectral biomarkers. Furthermore, by combing spectral biomarkers with age, gender, and cardiac histopathological changes, the accuracy of the SVM model could get 100%.
Conclusion
Integrating artificial intelligence technology, pathology, and physical chemistry analysis of blood components can serve as an effective auxiliary method for postmortem diagnosis of SCD.
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Data availability
The data supporting the conclusions are included in the article. The datasets used and/or analyzed during the current study are available from the corresponding author upon reasonable request.
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Acknowledgements
The authors thank the patients and their families for participating in this study.
Funding
This research was supported by grants from the National Natural Science Foundation of China (grant number 82072114) and the Fundamental Research Funds for the Central Universities of Central South University (2023ZZTS0546).
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The first draft of the manuscript was written by Jiao **ao. **angyan Zhang contributed to conception and design and carried out the analysis and interpretation of data. Fengqin Yang and Hongke Qu revised the draft and approved the revisions. Chengxin Ye, Sile Chen performed acquisition and analysis and interpretation of data. Supervision: Yadong Guo. All authors approved the version to be published and agree to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.
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**angyan Zhang and Jiao **ao are co-first authors and they made equal contributions to this work.
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Zhang, X., **ao, J., Yang, F. et al. Identification of sudden cardiac death from human blood using ATR-FTIR spectroscopy and machine learning. Int J Legal Med 138, 1139–1148 (2024). https://doi.org/10.1007/s00414-023-03118-7
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DOI: https://doi.org/10.1007/s00414-023-03118-7